Move Mobile Apps Folder To External Drive?

Hi guys,
I've got a MacBook Pro running Lion with all the latest software / updates.  This has become my secondary machine (since buying a lovely 27" iMac), and I'm using iTunes Match to keep both the MacBook Pro and iMac's iTunes libraries in sync.
Now that I sync my iPhone and iPad to the iMac, I don't have much need for the Mobile Apps folder on my MacBook Pro.  I have a lot of apps, so my Mobile Apps folder is ~50 gigs, and it's suddenly one of the larger items on the MacBook Pro's drive.  Would it be possible to relocate this folder to my external drive for the MacBook Pro?  I found an older suggestion (to move the Mobile Apps folder, and create a shortcut in the iTunes folder pointing back to me new location), but this didn't work at all.
Is this do-able?  As as alternate, can I just delete all the Apps from my MacBook Pro's iTunes library (from within the app) without screwing up the syncing or (via iTunes Match) inadvertantly deleting them all from the iMac as well?
Thanks!

How to use an SSD with your HDD
If you are going to use an SSD as a boot drive together with your existing HDD as the "data" drive, here's what you can do.
After installing the SSD you will need to partition and format the SSD using Disk Utility. Then, install OS X on the SSD. After OS X has been installed boot from the SSD. Use Startup Disk preferences to set the SSD as the startup volume.
Open Users & Groups preferences. Click on the lock icon and authenticate. CTRL- or RIGHT-click on your user account listing in the sidebar and select Advanced Options from the context menu.
You will see a field labeled "Home dir:" At the right end you will see a Change button. Click on it. In the file dialog locate the Home folder now located on the HDD (HDD/Users/account_name/.) Select the folder, click on Open button. Restart the computer as directed.
When the computer boots up it will now be using the Home folder located on the HDD.
Another more technical method involving the Terminal and aliases is discussed in depth here: Using OS X with an SSD plus HDD setup - Matt Gemmell. This is my preferred approach because I can select which of the Home's folders I want on the HDD and which I don't want. For example, I like to keep the Documents and Library folders on the SSD because I access their content frequently.
Be sure you retain the fully bootable system on your HDD in case you ever need it.

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